Method of forming ball-holders for ball-cages.



M. GOHLKE'.

METHOD OF FORMING BALL HOLDERS FOR BALL. GAGES.-

APPLICATION FILED NOV. 25, 1910.

1 031 644, Patented July 9,1912;

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UNTTED STATE$ PATENT OFFTQE.

MAX GOHLKE, OF PANKOW, NEAR. BERLIN, GERMANY, ASSIGNOR TO DEUTSCHEWAFFEN- UND MUNITIONS-FABRIKEN, OF BERLIN, GERMANY.

METHOD OF FORMING BALL-HOLDERS FOR BALL-CAGES.

Specification of Letters Patent.

Patented July 9, 1912.

Application filed November 25, 1910. Serial No. 593,998.

T 0 all whom 2'25 may concern Be it known that 1, MAX GOHLKE, engineer,a subject of the German Emperor, residing at Nos. 56 Florastrasse,Pankow, near Berlin, in the Empire of Germany, have invented certain newand useful Improvements in Methods of Forming Ball- Holders forBall-Gages, of which the following is a full, clear, and exactdescription.

This invention relates to such sheet metal cages for ball bearingswherein the balls are held by means of ball holders secured to a commonring. These ball holders are constructed as intermediate pieces and soarranged that intermediate pieces and ball guide chambers are formedalternately the balls being guided in the latter by bending back theflap-like side walls of the intermediate pieces. To avoid an automaticbending back or pressing together of the intermediate pieces it isnecessary that the latter should possess a certain degree of stiffness.This is secured according to the present invention by causing theintermediate pieces to form a selfcontained body, that is to say, theside walls of the intermediate pieces, which are constructed as guidingflaps, and the cross pieces which connect the intermediate pieces, forma connected whole.

The invention relates especially to the manufacture of such intermediatepieces.

The method of manufacture is shown by way of example in the accompanyingdraw- T igure 1 shows the intermediate piece in its first stage ofmanufacture, such intermediate piece consisting of tubing for ballbearings which is provided with incisions. Fig. 2 is a cross-sectionthrough the mandrel around which the body according to Fig. 1 ispressed. Fig. 3 shows the intermediate pieces in section and elevationand in an open and folded state. Fig. 4 is a view of the cage readyforinsertion in the hearing.

The method of manufacture is as follows: A tubular section (Fig. 1) isprovided with incisions a and b in such a manner that flaps c and d andcross-pieces e are formed.

The tubular section thus formed is pressed over a profile-mandrel, asshown in Fig. 2, and thus receives the shape required for the purpose asball holder. The flaps d which serve for securing the intermediate pieceon the common supporting ring 9 are then bent at right angles, as shownin Fig. 3, and the intermediate pieces with the flaps (Z are secured toa common supporting ring, Fig. 4, in any suitable manner. The cage maynow be inserted in the bearing and the flaps c bent around the balls inthe known manner. It is obvious that the procedure can be simplified bysimultaneously carrying out some working phases.

What I claim as my invention and desire to secure by Letters Patentis 1. The method of forming ball holders for ball cages of ballbearings, which includes slitting the ends of short tubular pieces ofmetal, and bending the slitted end portions outwardly to form ballengaging arms and arms for connecting the ballholders to a common ringrespectively.

2. The method of forming ball holders for ball cages of ball bearings,which in cludes cutting said ball holders from a piece of tubing havinga plurality of longitudinal incisions therein with the incisions ineither end of the severed part and bending the slit-ted end portionsoutwardly to form engaging arms for the balls and a common ringrespectively.

3. The method of forming ball holders for ball cages of ball bearings,which includes impressing upon a tube provided with incisions in bothends a shape corresponding to the arcs of a circle to form spacingabutments and bending the slitted end portions of said tube outwardly toform arms for engaging the balls and a common ring respectively.

In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

MAX GOHLKE.

l Vitnesses ROBERT MICHALSKI, HENRY HASPER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C."

